/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.integration;

import org.apache.iotdb.integration.env.EnvFactory;
import org.apache.iotdb.itbase.category.ClusterTest;
import org.apache.iotdb.itbase.category.LocalStandaloneTest;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import static org.junit.Assert.fail;

@Category({LocalStandaloneTest.class, ClusterTest.class})
public class IoTDBFillIT {

    private static String[] dataSet1 =
            new String[]{
                    "CREATE DATABASE root.ln.wf01.wt01",
                    "CREATE TIMESERIES root.ln.wf01.wt01.status WITH DATATYPE=BOOLEAN, ENCODING=PLAIN",
                    "CREATE TIMESERIES root.ln.wf01.wt01.temperature WITH DATATYPE=DOUBLE, ENCODING=PLAIN",
                    "CREATE TIMESERIES root.ln.wf01.wt01.hardware WITH DATATYPE=INT32, ENCODING=PLAIN",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(1, 1.1, false, 11)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(2, 2.2, true, 22)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(3, 3.3, false, 33 )",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(4, 4.4, false, 44)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(5, 5.5, false, 55)",
                    "flush",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(100, 100.1, false, 110)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(150, 200.2, true, 220)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(200, 300.3, false, 330 )",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(250, 400.4, false, 440)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(300, 500.5, false, 550)",
                    "flush",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(10, 10.1, false, 110)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(20, 20.2, true, 220)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(30, 30.3, false, 330 )",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(40, 40.4, false, 440)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(50, 50.5, false, 550)",
                    "flush",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(500, 100.1, false, 110)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(510, 200.2, true, 220)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(520, 300.3, false, 330 )",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(530, 400.4, false, 440)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(540, 500.5, false, 550)",
                    "flush",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(580, 100.1, false, 110)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(590, 200.2, true, 220)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(600, 300.3, false, 330 )",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(610, 400.4, false, 440)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(620, 500.5, false, 550)",
            };

    private static String[] dataSet2 =
            new String[]{
                    "CREATE DATABASE root.ln.wf01.wt02",
                    "CREATE TIMESERIES root.ln.wf01.wt02.status WITH DATATYPE=BOOLEAN, ENCODING=PLAIN",
                    "CREATE TIMESERIES root.ln.wf01.wt02.temperature WITH DATATYPE=DOUBLE, ENCODING=PLAIN",
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) "
                            + "values(100, 100.1, false)",
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) " + "values(150, 200.2, true)",
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) "
                            + "values(300, 500.5, false)",
                    "flush",
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) " + "values(600, 31.1, false)",
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) " + "values(750, 55.2, true)",
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) "
                            + "values(900, 1020.5, false)",
                    "flush",
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) "
                            + "values(1100, 98.41, false)",
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) "
                            + "values(1250, 220.2, true)",
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) " + "values(1400, 31, false)",
                    "flush",
            };

    private static final String TIMESTAMP_STR = "Time";
    private static final String TEMPERATURE_STR_1 = "root.ln.wf01.wt01.temperature";
    private static final String STATUS_STR_1 = "root.ln.wf01.wt01.status";
    private static final String TEMPERATURE_STR_2 = "root.ln.wf01.wt02.temperature";
    private static final String STATUS_STR_2 = "root.ln.wf01.wt02.status";
    private static final String HARDWARE_STR = "root.ln.wf01.wt01.hardware";

    @Before
    public void setUp() throws Exception {
        EnvFactory.getEnv().initBeforeTest();
        prepareData();
    }

    @After
    public void tearDown() throws Exception {
        EnvFactory.getEnv().cleanAfterTest();
    }

    @Test
    public void fillWithoutFilterTest() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            statement.execute(
                    "SELECT temperature, status, hardware"
                            + " FROM root.ln.wf01.wt01"
                            + " FILL(int32[linear, 5ms, 5ms], double[linear, 5ms, 5ms], boolean[previous, 5ms])");
            fail();
        } catch (SQLException e) {
            Assert.assertTrue(e.getMessage().contains("FILL must be used with a WHERE clause"));
        }
    }

    @Test
    public void fillWithInvalidFilterTest() {
        // Test fill with where clause with condition other than time=constant
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            statement.execute(
                    "SELECT temperature, status, hardware"
                            + " FROM root.ln.wf01.wt01 WHERE status=true"
                            + " FILL(int32[linear, 5ms, 5ms], double[linear, 5ms, 5ms], boolean[previous, 5ms])");
            fail();
        } catch (SQLException e) {
            Assert.assertTrue(
                    e.getMessage().contains("The condition of WHERE clause must be like time=constant"));
        }
    }

    @Test
    public void fillWithInvalidFilterTest2() {
        // Test fill with where clause with condition other than time=constant
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            statement.execute(
                    "SELECT temperature, status, hardware"
                            + " FROM root.ln.wf01.wt01 WHERE time>0"
                            + " FILL(int32[linear, 5ms, 5ms], double[linear, 5ms, 5ms], boolean[previous, 5ms])");
            fail();
        } catch (SQLException e) {
            Assert.assertTrue(
                    e.getMessage().contains("The condition of WHERE clause must be like time=constant"));
        }
    }

    @Test
    public void oldTypeLinearFillCommonTest() {
        String[] retArray1 =
                new String[]{"3,3.3,false,33", "70,70.34,false,374", "70,70.34,false,374"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            boolean hasResultSet =
                    statement.execute(
                            "select temperature,status, hardware from "
                                    + "root.ln.wf01.wt01 where time = 3 "
                                    + "Fill(int32[linear, 5ms, 5ms], double[linear, 5ms, 5ms], boolean[previous, 5ms])");

            Assert.assertTrue(hasResultSet);

            ResultSet resultSet = statement.getResultSet();
            int cnt = 0;
            try {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }

                hasResultSet =
                        statement.execute(
                                "select temperature,status, hardware "
                                        + "from root.ln.wf01.wt01 where time = 70 Fill(int32[linear, 500ms, 500ms], "
                                        + "double[linear, 500ms, 500ms], boolean[previous, 500ms])");

                Assert.assertTrue(hasResultSet);
                resultSet = statement.getResultSet();
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }

                hasResultSet =
                        statement.execute(
                                "select temperature,status, hardware "
                                        + "from root.ln.wf01.wt01 where time = 70 Fill(int32[linear], "
                                        + "double[linear], boolean[previous])");

                Assert.assertTrue(hasResultSet);
                resultSet = statement.getResultSet();
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }
            } finally {
                resultSet.close();
            }

        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void LinearFillCommonTest() {
        String[] retArray1 = new String[]{"3,3.3,false,33", "70,70.34,null,374", "70,70.34,null,374"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            boolean hasResultSet =
                    statement.execute(
                            "select temperature, status, hardware from "
                                    + "root.ln.wf01.wt01 where time = 3 "
                                    + "Fill(linear, 5ms, 5ms)");

            Assert.assertTrue(hasResultSet);

            ResultSet resultSet = statement.getResultSet();
            int cnt = 0;
            try {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }

                hasResultSet =
                        statement.execute(
                                "select temperature, status, hardware "
                                        + "from root.ln.wf01.wt01 where time = 70 "
                                        + "Fill(linear, 500ms, 500ms)");

                Assert.assertTrue(hasResultSet);
                resultSet = statement.getResultSet();
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }

                hasResultSet =
                        statement.execute(
                                "select temperature, status, hardware "
                                        + "from root.ln.wf01.wt01 where time = 70 "
                                        + "Fill(linear)");

                Assert.assertTrue(hasResultSet);
                resultSet = statement.getResultSet();
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }
            } finally {
                resultSet.close();
            }

        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void LinearFillWithBeforeOrAfterValueNullTest() {
        String[] retArray1 =
                new String[]{"70,null,null,null", "80,null,null,null", "625,null,false,null"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            boolean hasResultSet =
                    statement.execute(
                            "select temperature,status, hardware "
                                    + "from root.ln.wf01.wt01 where time = 70 "
                                    + "Fill(int32[linear, 25ms, 25ms], double[linear, 25ms, 25ms], boolean[previous, 5ms])");

            int cnt = 0;
            Assert.assertTrue(hasResultSet);
            ResultSet resultSet = statement.getResultSet();
            try {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }

                hasResultSet =
                        statement.execute(
                                "select temperature,status, hardware "
                                        + "from root.ln.wf01.wt01 where time = 80 "
                                        + "Fill(int32[linear, 25ms, 25ms], double[linear, 25ms, 25ms], boolean[previous, 5ms])");

                Assert.assertTrue(hasResultSet);
                resultSet = statement.getResultSet();
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }

                hasResultSet =
                        statement.execute(
                                "select temperature,status, hardware "
                                        + "from root.ln.wf01.wt01 where time = 625 "
                                        + "Fill(int32[linear, 25ms, 25ms], double[linear, 25ms, 25ms], boolean[previous, 5ms])");

                Assert.assertTrue(hasResultSet);
                resultSet = statement.getResultSet();
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }
            } finally {
                resultSet.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void oldTypeValueFillTest() {
        String res = "7,7.0,true,7";
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            boolean hasResultSet =
                    statement.execute(
                            "select temperature,status, hardware "
                                    + "from root.ln.wf01.wt01 where time = 7 "
                                    + "Fill(int32[7], double[7], boolean[true])");

            Assert.assertTrue(hasResultSet);
            ResultSet resultSet = statement.getResultSet();
            while (resultSet.next()) {
                String ans =
                        resultSet.getString(TIMESTAMP_STR)
                                + ","
                                + resultSet.getString(TEMPERATURE_STR_1)
                                + ","
                                + resultSet.getString(STATUS_STR_1)
                                + ","
                                + resultSet.getString(HARDWARE_STR);
                Assert.assertEquals(res, ans);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void valueFillTest() {
        String res = "7,7.0,null,7";
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            boolean hasResultSet =
                    statement.execute(
                            "select temperature, status, hardware "
                                    + "from root.ln.wf01.wt01 where time = 7 "
                                    + "Fill(7)");

            Assert.assertTrue(hasResultSet);
            ResultSet resultSet = statement.getResultSet();
            while (resultSet.next()) {
                String ans =
                        resultSet.getString(TIMESTAMP_STR)
                                + ","
                                + resultSet.getString(TEMPERATURE_STR_1)
                                + ","
                                + resultSet.getString(STATUS_STR_1)
                                + ","
                                + resultSet.getString(HARDWARE_STR);
                Assert.assertEquals(res, ans);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void stringValueFillTest() {
        String res = "7,null,null,null";
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            boolean hasResultSet =
                    statement.execute(
                            "select temperature, status, hardware "
                                    + "from root.ln.wf01.wt01 where time = 7 "
                                    + "Fill('test string')");

            Assert.assertTrue(hasResultSet);
            ResultSet resultSet = statement.getResultSet();
            while (resultSet.next()) {
                String ans =
                        resultSet.getString(TIMESTAMP_STR)
                                + ","
                                + resultSet.getString(TEMPERATURE_STR_1)
                                + ","
                                + resultSet.getString(STATUS_STR_1)
                                + ","
                                + resultSet.getString(HARDWARE_STR);
                Assert.assertEquals(res, ans);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void boolValueFillTest() {
        String res = "7,null,true,null";
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            boolean hasResultSet =
                    statement.execute(
                            "select temperature, status, hardware "
                                    + "from root.ln.wf01.wt01 where time = 7 "
                                    + "Fill(true)");

            Assert.assertTrue(hasResultSet);
            ResultSet resultSet = statement.getResultSet();
            while (resultSet.next()) {
                String ans =
                        resultSet.getString(TIMESTAMP_STR)
                                + ","
                                + resultSet.getString(TEMPERATURE_STR_1)
                                + ","
                                + resultSet.getString(STATUS_STR_1)
                                + ","
                                + resultSet.getString(HARDWARE_STR);
                Assert.assertEquals(res, ans);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void valueFillNonNullTest() {
        String res = "1,1.1,false,11";
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            boolean hasResultSet =
                    statement.execute(
                            "SELECT temperature, status, hardware"
                                    + " FROM root.ln.wf01.wt01"
                                    + " WHERE time = 1 FILL(int32[7], double[7], boolean[true])");

            Assert.assertTrue(hasResultSet);
            ResultSet resultSet = statement.getResultSet();
            while (resultSet.next()) {
                String ans =
                        resultSet.getString(TIMESTAMP_STR)
                                + ","
                                + resultSet.getString(TEMPERATURE_STR_1)
                                + ","
                                + resultSet.getString(STATUS_STR_1)
                                + ","
                                + resultSet.getString(HARDWARE_STR);
                Assert.assertEquals(res, ans);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void oldTypePreviousFillTest() {
        String[] retArray1 = new String[]{"3,3.3,false,33", "70,50.5,false,550", "70,null,null,null"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            boolean hasResultSet =
                    statement.execute(
                            "select temperature,status, hardware "
                                    + "from root.ln.wf01.wt01 where time = 3 "
                                    + "Fill(int32[previous, 5ms], double[previous, 5ms], boolean[previous, 5ms])");

            Assert.assertTrue(hasResultSet);
            int cnt;
            ResultSet resultSet = statement.getResultSet();
            try {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }

                hasResultSet =
                        statement.execute(
                                "select temperature,status, hardware "
                                        + "from root.ln.wf01.wt01 where time = 70 "
                                        + "Fill(int32[previous, 500ms], double[previous, 500ms], boolean[previous, 500ms])");

                Assert.assertTrue(hasResultSet);
                resultSet = statement.getResultSet();
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }

                hasResultSet =
                        statement.execute(
                                "select temperature,status, hardware "
                                        + "from root.ln.wf01.wt01 where time = 70 "
                                        + "Fill(int32[previous, 15ms], double[previous, 15ms], boolean[previous, 5ms])");

                Assert.assertTrue(hasResultSet);
                resultSet = statement.getResultSet();
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(retArray1.length, cnt);
            } finally {
                resultSet.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void PreviousFillTest() {
        String[] retArray1 = new String[]{"3,3.3,false,33", "70,50.5,false,550", "70,null,null,null"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            boolean hasResultSet =
                    statement.execute(
                            "select temperature,status, hardware "
                                    + "from root.ln.wf01.wt01 where time = 3 "
                                    + "Fill(previous, 5ms)");

            Assert.assertTrue(hasResultSet);
            int cnt;
            ResultSet resultSet = statement.getResultSet();
            try {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }

                hasResultSet =
                        statement.execute(
                                "select temperature,status, hardware "
                                        + "from root.ln.wf01.wt01 where time = 70 "
                                        + "Fill(previous, 500ms)");

                Assert.assertTrue(hasResultSet);
                resultSet = statement.getResultSet();
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }

                hasResultSet =
                        statement.execute(
                                "select temperature,status, hardware "
                                        + "from root.ln.wf01.wt01 where time = 70 "
                                        + "Fill(previous, 5ms)");

                Assert.assertTrue(hasResultSet);
                resultSet = statement.getResultSet();
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(retArray1.length, cnt);
            } finally {
                resultSet.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void EmptyTimeRangeFillTest() {
        String[] retArray1 = new String[]{"3,3.3,false,33", "70,70.34,false,374"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            boolean hasResultSet =
                    statement.execute(
                            "select temperature,status, hardware "
                                    + "from root.ln.wf01.wt01 where time = 3 "
                                    + "Fill(int32[linear], double[linear], boolean[previous])");

            Assert.assertTrue(hasResultSet);
            int cnt = 0;
            ResultSet resultSet = statement.getResultSet();
            try {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }

                hasResultSet =
                        statement.execute(
                                "select temperature,status, hardware "
                                        + "from root.ln.wf01.wt01 where time = 70 "
                                        + "Fill(int32[linear], double[linear], boolean[previous])");

                Assert.assertTrue(hasResultSet);
                resultSet = statement.getResultSet();
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_1)
                                    + ","
                                    + resultSet.getString(STATUS_STR_1)
                                    + ","
                                    + resultSet.getString(HARDWARE_STR);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }
            } finally {
                resultSet.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void PreviousFillWithOnlySeqFileTest() {
        String[] retArray = new String[]{"1050,1020.5,false", "800,55.2,true"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            ResultSet resultSet =
                    statement.executeQuery(
                            "select temperature,status "
                                    + "from root.ln.wf01.wt02 where time = 1050 Fill(double[previous])");

            int cnt = 0;
            try {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_2)
                                    + ","
                                    + resultSet.getString(STATUS_STR_2);
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }

                resultSet =
                        statement.executeQuery(
                                "select temperature,status "
                                        + "from root.ln.wf01.wt02 where time = 800 Fill(double[previous])");

                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_2)
                                    + ","
                                    + resultSet.getString(STATUS_STR_2);
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
            } finally {
                resultSet.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void PreviousFillWithOnlyUnseqFileOverlappedTest() {
        String[] retArray = new String[]{"58,82.1,true", "40,121.22,true", "80,32.2,false"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(50, 82.1, true)");
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(35, 121.22, true)");
            statement.execute("flush");

            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(25, 102.15, true)");
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(78, 32.2, false)");
            statement.execute("flush");

            int cnt = 0;
            ResultSet resultSet =
                    statement.executeQuery(
                            "select temperature,status "
                                    + "from root.ln.wf01.wt02 where time = 58 Fill(double[previous])");
            try {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_2)
                                    + ","
                                    + resultSet.getString(STATUS_STR_2);
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }

                resultSet =
                        statement.executeQuery(
                                "select temperature,status "
                                        + "from root.ln.wf01.wt02 where time = 40 Fill(double[previous])");
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_2)
                                    + ","
                                    + resultSet.getString(STATUS_STR_2);
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }

                resultSet =
                        statement.executeQuery(
                                "select temperature,status "
                                        + "from root.ln.wf01.wt02 where time = 80 Fill(double[previous])");
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_2)
                                    + ","
                                    + resultSet.getString(STATUS_STR_2);
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
            } finally {
                resultSet.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void PreviousFillMultiUnseqFileWithSameLastTest() {
        String[] retArray =
                new String[]{
                        "59,82.1,true", "52,32.2,false",
                };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(50, 82.1, true)");
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(35, 121.22, true)");
            statement.execute("flush");

            int cnt = 0;
            ResultSet resultSet =
                    statement.executeQuery(
                            "select temperature,status "
                                    + "from root.ln.wf01.wt02 where time = 59 Fill(double[previous])");
            try {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_2)
                                    + ","
                                    + resultSet.getString(STATUS_STR_2);
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }

                statement.execute(
                        "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(25, 102.15, true)");
                statement.execute(
                        "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(50, 32.2, false)");
                statement.execute("flush");

                resultSet =
                        statement.executeQuery(
                                "select temperature,status "
                                        + "from root.ln.wf01.wt02 where time = 52 Fill(double[previous])");
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_2)
                                    + ","
                                    + resultSet.getString(STATUS_STR_2);
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
            } finally {
                resultSet.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void PreviousFillSeqFileFilterOverlappedFilesTest() {
        String[] retArray1 =
                new String[]{
                        "886,55.2,true", "730,121.22,true",
                };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt = 0;
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(950, 82.1, true)");
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(650, 121.22, true)");
            statement.execute("flush");

            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(740, 33.1, false)");
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(420, 125.1, true)");
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(890, 22.82, false)");
            statement.execute("flush");

            ResultSet resultSet =
                    statement.executeQuery(
                            "select temperature,status from root.ln.wf01.wt02 where time = 886 "
                                    + "Fill(double[previous])");
            try {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_2)
                                    + ","
                                    + resultSet.getString(STATUS_STR_2);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }

                resultSet =
                        statement.executeQuery(
                                "select temperature,status from root.ln.wf01.wt02 where time = 730 "
                                        + "Fill(double[previous])");

                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_2)
                                    + ","
                                    + resultSet.getString(STATUS_STR_2);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }
            } finally {
                resultSet.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void PreviousFillUnseqFileFilterOverlappedFilesTest() {
        String[] retArray1 =
                new String[]{
                        "990,121.22,true", "925,33.1,false",
                };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt = 0;
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(1030, 82.1, true)");
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(940, 121.22, true)");
            statement.execute("flush");

            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(740, 62.1, false)");
            statement.execute("INSERT INTO root.ln.wf01.wt02(timestamp,status) values(980, true)");
            statement.execute("flush");

            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(910, 33.1, false)");
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(620, 125.1, true)");
            statement.execute("flush");

            ResultSet resultSet =
                    statement.executeQuery(
                            "select temperature,status from root.ln.wf01.wt02 where time = 990 "
                                    + "Fill(double[previous])");
            try {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_2)
                                    + ","
                                    + resultSet.getString(STATUS_STR_2);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }

                resultSet =
                        statement.executeQuery(
                                "select temperature,status from root.ln.wf01.wt02 where time = 925 "
                                        + "Fill(double[previous])");

                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_2)
                                    + ","
                                    + resultSet.getString(STATUS_STR_2);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }
            } finally {
                resultSet.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void PreviousFillWithNullUnseqFilesTest() {
        String[] retArray1 =
                new String[]{
                        "990,1020.5,true",
                };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt = 0;
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp, temperature, status) values(1030, 21.6, true)");
            statement.execute("INSERT INTO root.ln.wf01.wt02(timestamp,status) values(940, true)");
            statement.execute("flush");

            statement.execute("INSERT INTO root.ln.wf01.wt02(timestamp,status) values(740, false)");
            statement.execute("INSERT INTO root.ln.wf01.wt02(timestamp,status) values(980, true)");
            statement.execute("flush");

            ResultSet resultSet =
                    statement.executeQuery(
                            "select temperature,status from root.ln.wf01.wt02 where time = 990 "
                                    + "Fill(double[previous])");
            try {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_2)
                                    + ","
                                    + resultSet.getString(STATUS_STR_2);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }
            } finally {
                resultSet.close();
            }

        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void PreviousFillWithDeletionTest() {
        String[] retArray1 =
                new String[]{
                        "1080,21.6,true",
                };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt = 0;
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp, temperature, status) values(1030, 21.6, true)");
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp, temperature, status) values(940, 188.2, false)");

            statement.execute("DELETE FROM root.ln.wf01.wt02.temperature WHERE time < 1000");
            statement.execute("flush");
            statement.execute(
                    "INSERT INTO root.ln.wf01.wt02(timestamp,temperature,status) values(980, 47.22, true)");
            statement.execute("flush");

            ResultSet resultSet =
                    statement.executeQuery(
                            "select temperature,status from root.ln.wf01.wt02 where time = 1080 "
                                    + "Fill(double[previous])");
            try {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(TEMPERATURE_STR_2)
                                    + ","
                                    + resultSet.getString(STATUS_STR_2);
                    Assert.assertEquals(retArray1[cnt], ans);
                    cnt++;
                }
            } finally {
                resultSet.close();
            }

        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    private void prepareData() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            for (String sql : dataSet1) {
                statement.execute(sql);
            }
            for (String sql : dataSet2) {
                statement.execute(sql);
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
